The effects of a static exercise program verses Swiss ball training for core muscles of the lower back and pelvic region in patients with low back pain after child delivery. a single blind randomized control trial

Objectives: The objective of the study was to determine the effects of static exercise program verses Swiss ball training for core muscles of the lower back and pelvic region in patients with low back pain after child delivery. Methods: This was a prospective single blind randomized control trial conducted on a sample of 30 patients with low back pain from March 2018to December 2018. Patients were divided into 2 groups through seal envelop method i.e. static core exercises group (n=15) and Swiss ball training group (n=15). The outcome measures used for this study were numeric pain rating scale (NPRS), Oswestry disability index (ODI), goniometry and Core stability assessment scale. Data was analyzed by SPSS 21. Results: The mean age of patients in static core exercises group was 28.38 ± 4.8 years and mean age of Swiss Ball training group was 29.57 ± 3.3 years. Between group analysis showed non-significant difference whereas within group analysis showed significant improvement at post intervention. Conclusions: Both groups showed significant difference in reduction of pain (NPRS), in disability level due to LBP (ODI), better ROM flexion/extension of lumbar and achieving better strength at core stability assessment scale (CSA). These findings suggest that both exercise protocols are equally effective in rehabilitation of postpartum low back pain. Keywords: low back pain Postpartum Swiss ball training Static Continuous...

A perturbative approach to the time-dependent Karmarkar condition

In this work we employ a perturbative approach to study the gravitational collapse of a shear-free radiating star. The collapse proceeds from an initial static core satisfying the time-independent Karmarkar condition and degenerates into a quasi-static regime with the generation of energy in the form of a radial heat flux. The time-dependent Karmarkar condition is solved together with the boundary condition to yield the full gravitational behaviour of the star. Our model is subjected to rigorous regularity, causality and stability tests.

THE McSAFE PROJECT - HIGH-PERFORMANCE MONTE CARLO BASED METHODS FOR SAFETY DEMONSTRATION: FROM PROOF OF CONCEPT TO INDUSTRY APPLICATIONS

The increasing use of Monte Carlo methods for core analysis is fostered by the huge and cheap computer power available nowadays e.g. in large HPC. Apart from the classical criticality calculations, the application of Monte Carlo methods for depletion analysis and cross section generation for diffusion and transport core simulators is also expanding. In addition, the development of multi-physics codes by coupling Monte Carlo solvers with thermal hydraulic codes (CFD, subchannel and system thermal hydraulics) to perform full core static core analysis at fuel assembly or pin level has progressed in the last decades. Finally, the extensions of the Monte Carlo codes to describe the behavior of prompt and delay neutrons, control rod movements, etc. has been started some years ago. Recent coupling of dynamic versions of Monte Carlo codes with subchannel codes make possible the analysis of transient e.g. rod ejection accidents and it paves the way for the simulation of any kind of design basis accidents as an alternative option to the use of diffusion and transport based deterministic solvers. The H2020 McSAFE Project is focused on the improvement of methods for depletion considering thermal hydraulic feedbacks, extension of the coupled neutronic/thermal hydraulic codes by the incorporation of a fuel performance solver, the development of dynamic Monte Carlo codes and the development of methods to handle large depletion problems and to reduce the statistical uncertainty. The validation of the multi-physics tools developed within McSAFE will be performed using plant data and unique tests e.g. the SPERT III E REA test. This paper will describe the main developments, solution approaches, and selected results.

TRANSIENT CALCULATIONS OF SPERT III EXPERIMENTS

Cold-startup and hot-standby reactivity accident tests conducted at the SPERT III E-core research reactor are analysed with the coupled neutron-kinetic/thermal-hydraulic code system DYN3D-ATHLET. Homogenised 2-group cross sections for DYN3D are thereby generated with the Monte Carlo neutron transport code Serpent 2 in combination with the ENDF/B-VII.1 cross section library. Results in terms of maximum power, energy release, and reactivity compensation are in good agreement with the experimental values. The time-dependent contributions to the reactivity feedback are investigated for both a cold-startup test and a hot-standby test. These findings prove the suitability of the combined application of the simulation codes to predict the reactor dynamic behaviour in the event of prompt-critical and super-prompt critical transients even for small reactor cores. Furthermore, static core characteristics of the SPERT III E-core reactor at cold-startup condition are analysed with using a static DYN3D model, a detailed Serpent reference model, and a simplified Serpent model consistent with the DYN3D model. The critical control rod position and the excess reactivities of both the control rods and the transient rod obtained with the Serpent reference model are consistent with the experimental values. For the same parameters, the DYN3D model is in good agreement with the Serpent simplified model.

Dissipative collapse of a Karmarkar star

In this paper, we employ the Karmarkar condition to model a spherically symmetric radiating star undergoing dissipative gravitational collapse within the framework of classical general relativity. The collapse ensues from an initial static core satisfying the Karmarkar condition in isotropic coordinates and proceeds nonadiabatically by emitting energy in the form of a radial heat flux to the exterior Vaidya spacetime. We show that the dynamical nature of the collapse is sensitive to the initial static configuration that inherently links the embedding to the final remnant. Our model considered several physical tests on how an initially static stellar structure onset to a radiative collapse.

Mapping Static Core-Holes and Ring-Currents with X-ray Scattering

Measuring the attosecond movement of electrons in molecules is challenging due to the high temporal and spatial resolutions required. X-ray scattering-based methods are promising, but many questions remain concerning the...

New approaches to the improvement of coordination skills of young basketball players aged 13-14

The aim of the research is to explore the perspective of the improvement of coordination skills of young bas- ketball players in the framework of the experimental training program providing the use of open competition, "balance ladder" and static core-muscles exercises. Materials and methods of the research. The research brought together two groups of twelve basketball players aged 13-14 from youth basketball teams "Express" (experimental group from Velikie Luki) and "Youth" (con- trol group from Pskov). Length of training programs was 8 months. We used three groups of tests: physical fitness, "closed" tests and "open" tests. Research results and discussion. After 8 months of training, participants of the experimental group showed higher results in physical fitness tests, "closed" and "open" tests, indicating a superior level of their coordina- tion skills, compared to the control group. Conclusion. The experimental training program that we have designed and implemented provides the im- provement of coordination skills of young basketball players.

Comparison of static and dynamic core exercises’ effects on Stork balance test in soccer players Futbolcularda statik ve dinamik core egzersizlerin Stork denge testine etkisi

This study compared the effects of dynamic and static core training programs on core stability tests and Stork balance performance in soccer players. A Static (n = 14, 18,21±1,81) and Dynamic (n = 13, 17,31±0,63) training groups performed three 30 min sessions per week for eight weeks meanwhile attended routine soccer training sessions with a control group (n = 11, 17,73±1,27). Effects of different core training regimes were compared after eight weeks with two-factor variance analysis (condition X time) for related measures. Two experiment groups improved dynamic and static core stabilization test scores, while control group did not change. Core stabilization tests showed that the improvements of experiment groups affected by the movement specifity and Static group increased static test scores (plank 23,8% - back isometric 28,9% - leg raise 15,6%) while Dynamic group increased mostly the dynamic test scores (sit-up 21,2%, push up 16,2%). For Stork balance, both experiment groups improved the test scores between %18 and %67. While the Static group increased the duration of Stork test on both feet more than the Dynamic group, this difference was statistically significant only for non-dominant foot in intergroup analysis. The static structure of the Stork test may explain the significant improvement in static core group. Results indicate that the positive effect of core training on core stability may improve balance and static core training may be more effective for static balance tests.Extended English abstract is in the end of PDF (TURKISH) file. ÖzetBu çalışmanın amacı, 8 haftalık statik ve dinamik core egzersizlerin futbolcularda core stabilizasyon ve Stork denge performansı üzerine etkisini karşılaştırmaktır. Toplam 38 sporcu (17,75±1,36) Dinamik (n=13, 17,31±0,63), Statik (n=14, 18,21±1,81) ve Kontrol (n=11, 17,73±1,27) grupları olarak üç gruba ayrıldı. Statik ve Dinamik egzersiz grupları 8 hafta, haftada 3 gün, günde yaklaşık 30 dakika statik ya da dinamik egzersizler uygularken, buna karşın kontrol grubu yalnızca futbol antrenmanları gerçekleştirdi. Verilerin analizinde ilişkili ölçümler için iki faktörlü varyans analizi kullanıldı. Tüm core stabilizasyon testlerinde deney grupları anlamlı gelişme görüldü. Kontrol grubunda değişme görülmedi. Gelişmenin hareketin spesifikliğinden etkilendiği, Statik grubun statik test skorlarını daha fazla arttırdığı (plank 23,8% - sırt izometrik 28,9%- bacak kaldırma 15,6%), Dinamik grubun ise dinamik testlerde skorları daha fazla arttırdığı (şınav 16,2% - mekik 21,2%) görüldü. Benzer şekilde, iki deney grubu Stork denge testinde her iki ayak için denge süresini % 18 ile% 67 arasında artırdı. Ama kontrol grubu değişmedi. Statik grup her iki ayak içinde dengede kalma süresini Dinamik gruba göre daha fazla arttırırken, gruplar arası analizde non-dominant ayak ölçümünde bu farklılık istatistiksel olarak anlamlılık g. Denge ölçümünün statik yapıda olması, Statik gruptaki yüksek gelişimi açıklayabilir. Sonuç olarak; dinamik ve statik core egzersizler ile artan core stabilizasyonun statik denge üzerinde olumlu etkisi olduğu tespit edildi. Ancak statik core çalışmalarının statik denge performansı için daha etkili olduğu söylenebilir.

The Concept of the Self in Come Walk with Me: A Memoir by Beatrice Mosionier

Beatrice (Culleton) Mosionier is a Canadian Métis writer, whose first strongly autobiographical novel In Search of April Raintree (1983) has been recognized as a classic of contemporary Native Canadian literatures. Her memoir, Come Walk with Me (2009), describes her life story from 1949 till 1987, covering also the period between 1987 and 2001 in a brief epilogue. In the memoir, Mosionier uses fragments of the transcript of an interview conducted with her mother in 1984 by Alanis Obomsawin to preface the three parts of her book. Apart from constructing the two lives as parallel and in dialogue with one another, Mosionier frames and dialogises her story also through references to the process of writing, publication and the success of her novel; and reaches out to readers to induce them to “walk” with her. The aim of the present article is to examine the narrative presentation of the process of self-discovery focusing in particular on the relational aspects of the life story. Mosionier’s memoir demonstrates her growing into the realisation of the fact that her identity is relational-she recognizes herself as part of a larger ethnic and social group, and later also as shaped by familial relations. While depicting “the self [that] is dynamic, changing, and plural” (Eakin 1999: 98), she conceptualises it in reference to what she believes to be an essentially static core identity, and as “channelled” through a life that largely follows a predetermined pattern.

Experiments on cloaking in optics, thermodynamics and mechanics

Spatial coordinate transformations can be used to transform boundaries, material parameters or discrete lattices. We discuss fundamental constraints in regard to cloaking and review our corresponding experiments in optics, thermodynamics and mechanics. For example, we emphasize three-dimensional broadband visible-frequency carpet cloaking, transient thermal cloaking, three-dimensional omnidirectional macroscopic broadband cloaking for diffuse light throughout the entire visible range, cloaking for flexural waves in thin plates and three-dimensional elasto-static core–shell cloaking using pentamode mechanical metamaterials.